Gravitational lensing analysis of the Kilo-Degree Survey

被引：329

作者：

Kuijken, Konrad ^{[1
]}

Heymans, Catherine ^{[2
]}

Hildebrandt, Hendrik ^{[3
]}

Nakajima, Reiko ^{[3
]}

Erben, Thomas ^{[3
]}

de Jong, Jelte T. A. ^{[1
]}

Viola, Massimo ^{[1
]}

Choi, Ami

Hoekstra, Henk ^{[1
]}

Miller, Lance ^{[4
]}

van Uitert, Edo ^{[3
,5
]}

Amon, Alexandra ^{[2
]}

Blake, Chris ^{[6
]}

Brouwer, Margot ^{[1
]}

Buddendiek, Axel ^{[3
]}

Conti, Ian Fenech ^{[7
,8
]}

Eriksen, Martin ^{[1
]}

Grado, Aniello ^{[9
]}

Harnois-Deraps, Joachim ^{[10
]}

Helmich, Ewout ^{[1
]}

Herbonnet, Ricardo ^{[1
]}

Irisarri, Nancy ^{[1
]}

Kitching, Thomas ^{[11
]}

Klaes, Dominik ^{[3
]}

La Barbera, Francesco ^{[9
]}

Napolitano, Nicola ^{[9
]}

Radovich, Mario ^{[12
]}

Schneider, Peter

Sifon, Cristobal ^{[1
]}

Sikkema, Gert

Simon, Patrick ^{[3
]}

Tudorica, Alexandru ^{[3
]}

Valentijn, Edwin ^{[13
]}

Kleijn, Gijs Verdoes ^{[13
]}

van Waerbeke, Ludovic ^{[10
]}

机构：

[1] Leiden Univ, Leiden Observ, NL-2333 CA Leiden, Netherlands

[2] Univ Edinburgh, Royal Observ, Inst Astron, Scottish Univ Phys Alliance, Edinburgh EH9 3HJ, Midlothian, Scotland

[3] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany

[4] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[5] UCL, London WC1E 6BT, England

[6] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[7] Univ Malta, Inst Space Sci & Astron, Msida 2080, MSD, Malta

[8] Univ Malta, Dept Phys, Msida 2080, MSD, Malta

[9] INAF Osservatorio Astron Capodimonte, I-80131 Naples, Italy

[10] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[11] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[12] INAF Osservatorio Astron Padova, I-35122 Padua, Italy

[13] Univ Groningen, Kapteyn Inst, NL-9700 AV Groningen, Netherlands

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 454卷 / 04期

基金：

欧洲研究理事会; 澳大利亚研究理事会; 加拿大自然科学与工程研究理事会;

关键词：

gravitational lensing: weak; surveys; galaxies: photometry; cosmology: observations; DIGITAL SKY SURVEY; GALAXY SHAPE MEASUREMENT; DARK-MATTER HALOES; COSMIC SHEAR; DATA RELEASE; REDSHIFT DISTRIBUTIONS; STRUCTURAL PARAMETERS; PHOTOMETRIC REDSHIFTS; CFHTLS-WIDE; WEAK;

D O I：

10.1093/mnras/stv2140

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Kilo-Degree Survey (KiDS) is a multi-band imaging survey designed for cosmological studies from weak lensing and photometric redshifts. It uses the European Southern Observatory VLT Survey Telescope with its wide-field camera OmegaCAM. KiDS images are taken in four filters similar to the Sloan Digital Sky Survey ugri bands. The best seeing time is reserved for deep r-band observations. The median 5 sigma limiting AB magnitude is 24.9 and the median seeing is below 0.7 arcsec. Initial KiDS observations have concentrated on the Galaxy and Mass Assembly (GAMA) regions near the celestial equator, where extensive, highly complete redshift catalogues are available. A total of 109 survey tiles, 1 square degree each, form the basis of the first set of lensing analyses of halo properties of GAMA galaxies. Nine galaxies per square arcminute enter the lensing analysis, for an effective inverse shear variance of 69 arcmin(-2). Accounting for the shape measurement weight, the median redshift of the sources is 0.53. KiDS data processing follows two parallel tracks, one optimized for weak lensing measurement and one for accurate matched-aperture photometry (for photometric redshifts). This technical paper describes the lensing and photometric redshift measurements (including a detailed description of the Gaussian aperture and photometry pipeline), summarizes the data quality and presents extensive tests for systematic errors that might affect the lensing analyses. We also provide first demonstrations of the suitability of the data for cosmological measurements, and describe our blinding procedure for preventing confirmation bias in the scientific analyses. The KiDS catalogues presented in this paper are released to the community through http://kids.strw.leidenuniv.nl.

引用

页码：3500 / 3532

页数：33

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